new

# File activerecord/lib/active_record/migration.rb, line 1179
    def initialize(direction, migrations, target_version = nil)
      @direction         = direction
      @target_version    = target_version
      @migrated_versions = nil
      @migrations        = migrations

      validate(@migrations)

      ActiveRecord::SchemaMigration.create_table
      ActiveRecord::InternalMetadata.create_table
    end